453.I don't understand how you got a ticket.I always ______ you _____ a careful driver.
A.think;are
B.am thinking;are
C.thought;were
D.think;were
454.The number of university graduates taking the civil servant examination __________ rising these years,which reflects the fierce job competition.
A.keeps
B.is keeping
C.has been keeping
D.kept
453.答案是C;考查动词的时态在具体语境中的应用。根据上下文得知，由于粗心驾车，导致罚单。句意:我原先以为你很细心的。
454.答案是A;此题陈述事实，故用一般现在时。
